2024-03-28T13:29:00Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/407202021-06-24T07:47:42Zcom_10324_31661com_10324_952com_10324_894com_10324_1158com_10324_931col_10324_31662col_10324_1242
UVaDOC
author
Martín de León, Judit
author
Bernardo García, Victoria
author
Rodríguez Pérez, Miguel Ángel
2020-04-06T08:52:07Z
2020-04-06T08:52:07Z
2017
acromolecular Materials and EngineeringVolume 302, Issue 12
1438-7492
http://uvadoc.uva.es/handle/10324/40720
10.1002/mame.201700343
1700343
12
Macromolecular Materials and Engineering
302
Transparent nanocellular polymethylmethacrylate (PMMA) with relative density around 0.4 is produced for the first time by using the gas dissolution foaming technique. The processing conditions and the typical characteristics of the cellular structure needed to manufacture this novel material are discovered. It is proved that low saturation temperatures (−32 °C) combined with high saturation pressures (6, 10, 20 MPa) allow increasing the solubility of PMMA up to values not reached before. In particular, the highest CO2 uptake ever reported for PMMA, (i.e., 48 wt%) is found for a saturation pressure of 20 MPa and a saturation temperature of −32 °C. Due to these processing conditions, cell nucleation densities of 1016 nuclei cm−3 and cell sizes clearly below 50 nm are achieved. The nanocellular polymers obtained, with cell sizes ten times smaller than the wavelength of visible light and very homogeneous cellular structures, show a significant transparency.
spa
Key Production Parameters to Obtain Transparent Nanocellular PMMA
info:eu-repo/semantics/article
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URL
https://uvadoc.uva.es/bitstream/10324/40720/1/Macro%20Materials%202018.pdf
File
MD5
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application/pdf
Macro Materials 2018.pdf